Characteristics of Light

Q. Which colour of light has the shorter wavelength − red or violet?

Q. The distance light travels in one year is approximately $5,870,000,000,000$km. The distance light travels in $100$ years is:

1. $587\times {10}^8$km
2. $587\times {10}^{-10}$km
3. $587\times {10}^{10}$km
4. $587\times {10}^{12}$km
5. $587\times {10}^{-12}$km